//go:build windows
// +build windows

/*
Copyright 2018 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package winkernel

import (
	"encoding/json"

	"github.com/Microsoft/hcsshim/hcn"

	"strings"
	"testing"

	"github.com/google/go-cmp/cmp"
)

const (
	sourceVip         = "192.168.1.2"
	serviceVip        = "11.0.0.1"
	addressPrefix     = "192.168.1.0/24"
	gatewayAddress    = "192.168.1.1"
	epMacAddress      = "00-11-22-33-44-55"
	epIpAddress       = "192.168.1.3"
	epIpAddressRemote = "192.168.2.3"
	epPaAddress       = "10.0.0.3"
	protocol          = 6
	internalPort      = 80
	externalPort      = 32440
)

func TestGetNetworkByName(t *testing.T) {
	hnsV1 := hnsV1{}
	hnsV2 := hnsV2{}

	testGetNetworkByName(t, hnsV1)
	testGetNetworkByName(t, hnsV2)
}
func TestGetEndpointByID(t *testing.T) {
	hnsV1 := hnsV1{}
	hnsV2 := hnsV2{}

	testGetEndpointByID(t, hnsV1)
	testGetEndpointByID(t, hnsV2)
}
func TestGetEndpointByIpAddressAndName(t *testing.T) {
	hnsV1 := hnsV1{}
	hnsV2 := hnsV2{}

	testGetEndpointByIpAddressAndName(t, hnsV1)
	testGetEndpointByIpAddressAndName(t, hnsV2)
}
func TestCreateEndpointLocal(t *testing.T) {
	hnsV1 := hnsV1{}
	hnsV2 := hnsV2{}

	testCreateEndpointLocal(t, hnsV1)
	testCreateEndpointLocal(t, hnsV2)
}
func TestCreateEndpointRemotePA(t *testing.T) {
	hnsV1 := hnsV1{}
	hnsV2 := hnsV2{}

	testCreateEndpointRemote(t, hnsV1, epPaAddress)
	testCreateEndpointRemote(t, hnsV2, epPaAddress)
}
func TestCreateEndpointRemoteNoPA(t *testing.T) {
	hnsV1 := hnsV1{}
	hnsV2 := hnsV2{}

	testCreateEndpointRemote(t, hnsV1, "")
	testCreateEndpointRemote(t, hnsV2, "")
}
func TestDeleteEndpoint(t *testing.T) {
	hnsV1 := hnsV1{}
	hnsV2 := hnsV2{}

	testDeleteEndpoint(t, hnsV1)
	testDeleteEndpoint(t, hnsV2)
}
func TestGetLoadBalancerExisting(t *testing.T) {
	hnsV1 := hnsV1{}
	hnsV2 := hnsV2{}

	testGetLoadBalancerExisting(t, hnsV1)
	testGetLoadBalancerExisting(t, hnsV2)
}
func TestGetLoadBalancerNew(t *testing.T) {
	hnsV1 := hnsV1{}
	hnsV2 := hnsV2{}

	testGetLoadBalancerNew(t, hnsV1)
	testGetLoadBalancerNew(t, hnsV2)
}
func TestDeleteLoadBalancer(t *testing.T) {
	hnsV1 := hnsV1{}
	hnsV2 := hnsV2{}

	testDeleteLoadBalancer(t, hnsV1)
	testDeleteLoadBalancer(t, hnsV2)
}
func testGetNetworkByName(t *testing.T, hns HostNetworkService) {
	Network := mustTestNetwork(t)

	network, err := hns.getNetworkByName(Network.Name)
	if err != nil {
		t.Error(err)
	}

	if !strings.EqualFold(network.id, Network.Id) {
		t.Errorf("%v does not match %v", network.id, Network.Id)
	}
	err = Network.Delete()
	if err != nil {
		t.Error(err)
	}
}
func testGetEndpointByID(t *testing.T, hns HostNetworkService) {
	Network := mustTestNetwork(t)

	ipConfig := &hcn.IpConfig{
		IpAddress: epIpAddress,
	}
	Endpoint := &hcn.HostComputeEndpoint{
		IpConfigurations: []hcn.IpConfig{*ipConfig},
		MacAddress:       epMacAddress,
		SchemaVersion: hcn.SchemaVersion{
			Major: 2,
			Minor: 0,
		},
	}

	Endpoint, err := Network.CreateEndpoint(Endpoint)
	if err != nil {
		t.Error(err)
	}

	endpoint, err := hns.getEndpointByID(Endpoint.Id)
	if err != nil {
		t.Error(err)
	}
	if !strings.EqualFold(endpoint.hnsID, Endpoint.Id) {
		t.Errorf("%v does not match %v", endpoint.hnsID, Endpoint.Id)
	}

	err = Endpoint.Delete()
	if err != nil {
		t.Error(err)
	}
	err = Network.Delete()
	if err != nil {
		t.Error(err)
	}
}
func testGetEndpointByIpAddressAndName(t *testing.T, hns HostNetworkService) {
	Network := mustTestNetwork(t)

	ipConfig := &hcn.IpConfig{
		IpAddress: epIpAddress,
	}
	Endpoint := &hcn.HostComputeEndpoint{
		IpConfigurations: []hcn.IpConfig{*ipConfig},
		MacAddress:       epMacAddress,
		SchemaVersion: hcn.SchemaVersion{
			Major: 2,
			Minor: 0,
		},
	}
	Endpoint, err := Network.CreateEndpoint(Endpoint)
	if err != nil {
		t.Error(err)
	}

	endpoint, err := hns.getEndpointByIpAddress(Endpoint.IpConfigurations[0].IpAddress, Network.Name)
	if err != nil {
		t.Error(err)
	}
	if !strings.EqualFold(endpoint.hnsID, Endpoint.Id) {
		t.Errorf("%v does not match %v", endpoint.hnsID, Endpoint.Id)
	}
	if endpoint.ip != Endpoint.IpConfigurations[0].IpAddress {
		t.Errorf("%v does not match %v", endpoint.ip, Endpoint.IpConfigurations[0].IpAddress)
	}

	endpoint, err = hns.getEndpointByName(Endpoint.Name)
	if err != nil {
		t.Error(err)
	}
	diff := cmp.Diff(endpoint, Endpoint)
	if diff != "" {
		t.Errorf("getEndpointByName(%s) returned a different endpoint. Diff: %s ", Endpoint.Name, diff)
	}

	err = Endpoint.Delete()
	if err != nil {
		t.Error(err)
	}
	err = Network.Delete()
	if err != nil {
		t.Error(err)
	}
}
func testCreateEndpointLocal(t *testing.T, hns HostNetworkService) {
	Network := mustTestNetwork(t)

	endpoint := &endpointsInfo{
		ip:         epIpAddress,
		macAddress: epMacAddress,
		isLocal:    true,
	}

	endpoint, err := hns.createEndpoint(endpoint, Network.Name)
	if err != nil {
		t.Error(err)
	}
	Endpoint, err := hcn.GetEndpointByID(endpoint.hnsID)
	if err != nil {
		t.Error(err)
	}
	if !strings.EqualFold(endpoint.hnsID, Endpoint.Id) {
		t.Errorf("%v does not match %v", endpoint.hnsID, Endpoint.Id)
	}
	if endpoint.ip != Endpoint.IpConfigurations[0].IpAddress {
		t.Errorf("%v does not match %v", endpoint.ip, Endpoint.IpConfigurations[0].IpAddress)
	}
	if endpoint.macAddress != Endpoint.MacAddress {
		t.Errorf("%v does not match %v", endpoint.macAddress, Endpoint.MacAddress)
	}

	err = Endpoint.Delete()
	if err != nil {
		t.Error(err)
	}
	err = Network.Delete()
	if err != nil {
		t.Error(err)
	}
}
func testCreateEndpointRemote(t *testing.T, hns HostNetworkService, providerAddress string) {
	Network := mustTestNetwork(t)

	endpoint := &endpointsInfo{
		ip:              epIpAddressRemote,
		macAddress:      epMacAddress,
		isLocal:         false,
		providerAddress: providerAddress,
	}

	endpoint, err := hns.createEndpoint(endpoint, Network.Name)
	if err != nil {
		t.Error(err)
	}
	Endpoint, err := hcn.GetEndpointByID(endpoint.hnsID)
	if err != nil {
		t.Error(err)
	}
	if !strings.EqualFold(endpoint.hnsID, Endpoint.Id) {
		t.Errorf("%v does not match %v", endpoint.hnsID, Endpoint.Id)
	}
	if endpoint.ip != Endpoint.IpConfigurations[0].IpAddress {
		t.Errorf("%v does not match %v", endpoint.ip, Endpoint.IpConfigurations[0].IpAddress)
	}
	if endpoint.macAddress != Endpoint.MacAddress {
		t.Errorf("%v does not match %v", endpoint.macAddress, Endpoint.MacAddress)
	}
	if len(providerAddress) != 0 && endpoint.providerAddress != epPaAddress {
		t.Errorf("%v does not match %v", endpoint.providerAddress, providerAddress)
	}

	err = Endpoint.Delete()
	if err != nil {
		t.Error(err)
	}
	err = Network.Delete()
	if err != nil {
		t.Error(err)
	}
}
func testDeleteEndpoint(t *testing.T, hns HostNetworkService) {
	Network := mustTestNetwork(t)

	ipConfig := &hcn.IpConfig{
		IpAddress: epIpAddress,
	}
	Endpoint := &hcn.HostComputeEndpoint{
		IpConfigurations: []hcn.IpConfig{*ipConfig},
		MacAddress:       epMacAddress,
		SchemaVersion: hcn.SchemaVersion{
			Major: 2,
			Minor: 0,
		},
	}
	Endpoint, err := Network.CreateEndpoint(Endpoint)
	if err != nil {
		t.Error(err)
	}
	err = hns.deleteEndpoint(Endpoint.Id)
	if err != nil {
		t.Error(err)
	}
	// Endpoint should no longer exist so this should fail
	Endpoint, err = hcn.GetEndpointByID(Endpoint.Id)
	if err == nil {
		t.Error(err)
	}

	err = Network.Delete()
	if err != nil {
		t.Error(err)
	}
}

func testGetLoadBalancerExisting(t *testing.T, hns HostNetworkService) {
	Network := mustTestNetwork(t)
	lbs := make(map[loadBalancerIdentifier]*(loadBalancerInfo))

	ipConfig := &hcn.IpConfig{
		IpAddress: epIpAddress,
	}
	Endpoint := &hcn.HostComputeEndpoint{
		IpConfigurations: []hcn.IpConfig{*ipConfig},
		MacAddress:       epMacAddress,
		SchemaVersion: hcn.SchemaVersion{
			Major: 2,
			Minor: 0,
		},
	}
	Endpoint, err := Network.CreateEndpoint(Endpoint)
	if err != nil {
		t.Error(err)
	}

	Endpoints := []hcn.HostComputeEndpoint{*Endpoint}
	LoadBalancer, err := hcn.AddLoadBalancer(
		Endpoints,
		hcn.LoadBalancerFlagsNone,
		hcn.LoadBalancerPortMappingFlagsNone,
		sourceVip,
		[]string{serviceVip},
		protocol,
		internalPort,
		externalPort,
	)
	if err != nil {
		t.Error(err)
	}
	// We populate this to ensure we test for getting existing load balancer
	id := loadBalancerIdentifier{protocol: protocol, internalPort: internalPort, externalPort: externalPort, vip: serviceVip, endpointsCount: len(Endpoints)}
	lbs[id] = &loadBalancerInfo{hnsID: LoadBalancer.Id}

	endpoint := &endpointsInfo{
		ip:    Endpoint.IpConfigurations[0].IpAddress,
		hnsID: Endpoint.Id,
	}
	endpoints := []endpointsInfo{*endpoint}
	lb, err := hns.getLoadBalancer(endpoints, loadBalancerFlags{}, sourceVip, serviceVip, protocol, internalPort, externalPort, lbs)
	if err != nil {
		t.Error(err)
	}

	if !strings.EqualFold(lb.hnsID, LoadBalancer.Id) {
		t.Errorf("%v does not match %v", lb.hnsID, LoadBalancer.Id)
	}

	err = LoadBalancer.Delete()
	if err != nil {
		t.Error(err)
	}
	err = Endpoint.Delete()
	if err != nil {
		t.Error(err)
	}
	err = Network.Delete()
	if err != nil {
		t.Error(err)
	}
}
func testGetLoadBalancerNew(t *testing.T, hns HostNetworkService) {
	Network := mustTestNetwork(t)
	// We keep this empty to ensure we test for new load balancer creation.
	lbs := make(map[loadBalancerIdentifier]*(loadBalancerInfo))

	ipConfig := &hcn.IpConfig{
		IpAddress: epIpAddress,
	}
	Endpoint := &hcn.HostComputeEndpoint{
		IpConfigurations: []hcn.IpConfig{*ipConfig},
		MacAddress:       epMacAddress,
		SchemaVersion: hcn.SchemaVersion{
			Major: 2,
			Minor: 0,
		},
	}
	Endpoint, err := Network.CreateEndpoint(Endpoint)
	if err != nil {
		t.Error(err)
	}
	endpoint := &endpointsInfo{
		ip:    Endpoint.IpConfigurations[0].IpAddress,
		hnsID: Endpoint.Id,
	}
	endpoints := []endpointsInfo{*endpoint}
	lb, err := hns.getLoadBalancer(endpoints, loadBalancerFlags{}, sourceVip, serviceVip, protocol, internalPort, externalPort, lbs)
	if err != nil {
		t.Error(err)
	}
	LoadBalancer, err := hcn.GetLoadBalancerByID(lb.hnsID)
	if err != nil {
		t.Error(err)
	}
	if !strings.EqualFold(lb.hnsID, LoadBalancer.Id) {
		t.Errorf("%v does not match %v", lb.hnsID, LoadBalancer.Id)
	}
	err = LoadBalancer.Delete()
	if err != nil {
		t.Error(err)
	}

	err = Endpoint.Delete()
	if err != nil {
		t.Error(err)
	}
	err = Network.Delete()
	if err != nil {
		t.Error(err)
	}
}
func testDeleteLoadBalancer(t *testing.T, hns HostNetworkService) {
	Network := mustTestNetwork(t)

	ipConfig := &hcn.IpConfig{
		IpAddress: epIpAddress,
	}
	Endpoint := &hcn.HostComputeEndpoint{
		IpConfigurations: []hcn.IpConfig{*ipConfig},
		MacAddress:       epMacAddress,
		SchemaVersion: hcn.SchemaVersion{
			Major: 2,
			Minor: 0,
		},
	}
	Endpoint, err := Network.CreateEndpoint(Endpoint)
	if err != nil {
		t.Error(err)
	}

	Endpoints := []hcn.HostComputeEndpoint{*Endpoint}
	LoadBalancer, err := hcn.AddLoadBalancer(
		Endpoints,
		hcn.LoadBalancerFlagsNone,
		hcn.LoadBalancerPortMappingFlagsNone,
		sourceVip,
		[]string{serviceVip},
		protocol,
		internalPort,
		externalPort,
	)
	if err != nil {
		t.Error(err)
	}
	err = hns.deleteLoadBalancer(LoadBalancer.Id)
	if err != nil {
		t.Error(err)
	}
	// Load balancer should not longer exist
	LoadBalancer, err = hcn.GetLoadBalancerByID(LoadBalancer.Id)
	if err == nil {
		t.Error(err)
	}

	err = Endpoint.Delete()
	if err != nil {
		t.Error(err)
	}
	err = Network.Delete()
	if err != nil {
		t.Error(err)
	}
}
func mustTestNetwork(t *testing.T) *hcn.HostComputeNetwork {
	network, err := createTestNetwork()
	if err != nil {
		t.Fatalf("cannot create test network: %v", err)
	}
	if network == nil {
		t.Fatal("test network was nil without error")
	}
	return network
}
func createTestNetwork() (*hcn.HostComputeNetwork, error) {
	network := &hcn.HostComputeNetwork{
		Type: NETWORK_TYPE_OVERLAY,
		Name: "TestOverlay",
		MacPool: hcn.MacPool{
			Ranges: []hcn.MacRange{
				{
					StartMacAddress: "00-15-5D-52-C0-00",
					EndMacAddress:   "00-15-5D-52-CF-FF",
				},
			},
		},
		Ipams: []hcn.Ipam{
			{
				Type: "Static",
				Subnets: []hcn.Subnet{
					{
						IpAddressPrefix: addressPrefix,
						Routes: []hcn.Route{
							{
								NextHop:           gatewayAddress,
								DestinationPrefix: "0.0.0.0/0",
							},
						},
					},
				},
			},
		},
		SchemaVersion: hcn.SchemaVersion{
			Major: 2,
			Minor: 0,
		},
	}

	vsid := &hcn.VsidPolicySetting{
		IsolationId: 5000,
	}
	vsidJson, err := json.Marshal(vsid)
	if err != nil {
		return nil, err
	}

	sp := &hcn.SubnetPolicy{
		Type: hcn.VSID,
	}
	sp.Settings = vsidJson

	spJson, err := json.Marshal(sp)
	if err != nil {
		return nil, err
	}

	network.Ipams[0].Subnets[0].Policies = append(network.Ipams[0].Subnets[0].Policies, spJson)

	return network.Create()
}
